code: def test_calendar_storage(self):
      calendar = CalendarStorage(
          freq="day", future=False, provider_uri=self.provider_uri
      )
      assert isinstance(
          calendar[:], Iterable
      ), f"{calendar.__class__.__name__}.__getitem__(s: slice) is not Iterable"
      assert isinstance(
          calendar.data, Iterable
      ), f"{calendar.__class__.__name__}.data is not Iterable"
  
      print(f"calendar[1: 5]: {calendar[1:5]}")
      print(f"calendar[0]: {calendar[0]}")
      print(f"calendar[-1]: {calendar[-1]}")
  
      calendar = CalendarStorage(
          freq="1min", future=False, provider_uri="not_found"
      )
      with self.assertRaises(ValueError):
          print(calendar.data)
  
      with self.assertRaises(ValueError):
          print(calendar[:])
  
      with self.assertRaises(ValueError):
          print(calendar[0])
  
file_path: qlib/tests/storage_tests/test_storage.py
imports: from pathlib import Path
  from collections.abc import Iterable
  import numpy
  from qlib.tests import TestAutoData
  from qlib.data.storage.file_storage import FileCalendarStorage, FileInstrumentStorage, FileFeatureStorage
label_desc: Use image node_id 1 for calling the TestStorage obj's underlying member method code with example usage: obj.test_calendar_storage() without return types